But yeah, they are great for rock rock as in music inspired by the electric guitar. Not sure about alternative rock as electric guitars have less influence on them.

Got my hje900's today. Early impressions are that they are great for guitar driven rock! Very, very fun phone. The seller said they already had about 70 hrs on them and the highs are pretty bright but it's ok as long as you don't crank them too loud. The best part is that they really scale well with my JDS labs cmoy and when I switch on the bass boost, it only gets better. Definitely keepers.

Glad you like them! They're something special aren't they? They have that aggressive character that's needed in an aggressive genre. I think they still do rock better than my (much) more expensive IEMs and they definitely earned the right to have their own place in my collection

You were right on distortion guitars with the Panny's. They have a noticeable extra crunch. They are also fast and clear. Cymbals sound really good with them too but sometimes a little too splashy. I'm still experimenting with tips as I feel I'm not getting enough bass and seems tilted towards the treble end.

(It took me nearly 3 weeks to find the perfect tip combo with the new Atrio M5's but when I did they took on noticeable improvement. I was either getting treble heavy or bass heavy sound. Now that I've found the right tip, their sound is more balanced and enveloping; really, really enjoyable. I just wish their soundstage was wider.)

You were right on distortion guitars with the Panny's. They have a noticeable extra crunch. They are also fast and clear. Cymbals sound really good with them too but sometimes a little too splashy. I'm still experimenting with tips as I feel I'm not getting enough bass and seems tilted towards the treble end.

(It took me nearly 3 weeks to find the perfect tip combo with the new Atrio M5's but when I did they took on noticeable improvement. I was either getting treble heavy or bass heavy sound. Now that I've found the right tip, their sound is more balanced and enveloping; really, really enjoyable. I just wish their soundstage was wider.)

Wow, you've got a nice collection. Can I assume from your signature that you consider the M5 to be "=" to the TF10?

Yes, as in equally enjoyable in quality. However they have very different sound signatures. I still have yet to hear a phone that comes close to the TF10 treble and upper mids. They are just so effortless, airy and never fatiguing. Great sparkle an extension. Conversely I've not heard quality bass and sub bass like the new M5; all without bleeding into the mids. It leaves others lacking. I wish I could find a phone that combines the best of these two.